Question: How can you ensure that some code executes only when a class `active` appears on an element?

1. `$('.element').attr('class', 'active')`
2. `$('.element').with('.active')`
3. `$('.element').hasClass('active')`
4. `$('.active').then()`

Answer: The correct answer of the above question is Option C:`$('.element').hasClass('active')`